Equivalent & Substitute Parts for Signal Transformer 241-7-20

Part Overview

The Signal Transformer 241-7-20 is a laminated core power transformer rated at 56VA with a 115V primary and 20V secondary output. This chassis-mounted unit features a center tap and is designed for applications requiring regulated secondary voltage with isolation. The part is currently active in production with 722 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this transformer category.

Substiute Parts

241-7-20

Signal TransformerIn Stock: 748241-7-20 Datasheet

Current PartRFQ

186F20

Hammond ManufacturingIn Stock: 819186F20 Datasheet

DirectRFQ

F7-20

Triad MagneticsIn Stock: 1150F7-20 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 241-7-20 is determined by the following critical parameters:

• Primary Voltage: 115V input (single primary winding required for direct substitution)
• Secondary Voltage: 20V output at full load
• Power Rating: 56VA minimum capacity
• Output Current: 2.8A maximum
• Core Type: Laminated construction
• Center Tap: Required
• Mounting: Chassis mount configuration
• Termination: Solder and quick connect compatible
• Isolation Voltage: 2500Vrms minimum
• Compliance: ROHS3 compliant

Parts meeting all these parameters are classified as direct equivalents. Parts exceeding the power rating or current capacity while maintaining all other specifications are classified as compatible upgrades.

Parameter Comparison

Engineering Selection Recommendations

F7-20 (Triad Magnetics) is a direct equivalent to the 241-7-20. Both units share identical electrical specifications: 56VA power rating, 2.8A maximum output current, single primary and secondary windings, and 2500V isolation voltage. Physical dimensions are nearly identical, with the F7-20 measuring 93.65mm x 46.02mm compared to 93.70mm x 49.20mm for the 241-7-20. Both are ROHS3 compliant and active products. The F7-20 offers higher inventory availability at 1,072 units.

186F20 (Hammond Manufacturing) is a compatible upgrade. This unit exceeds the 241-7-20 specifications with 100VA power rating and 5A maximum output current, providing additional capacity margin. However, the 186F20 features dual primary windings (115V/230V) versus the single primary of the 241-7-20, and its isolation voltage is rated at 2000Vrms compared to 2500Vrms. Physical dimensions are larger at 102.36mm x 66.68mm with a maximum seated height of 65.02mm. The 186F20 is suitable for applications where increased power capacity is beneficial and space constraints permit the larger footprint. Both units are ROHS3 compliant and active products.

Frequently Asked Questions (FAQ)

Q: Can the F7-20 be used as a direct replacement for the 241-7-20?

A: Yes. The F7-20 meets all electrical and mechanical specifications of the 241-7-20, including 56VA power rating, 2.8A output current, 115V primary input, 20V secondary output, center tap configuration, and 2500V isolation voltage. Physical dimensions are equivalent within manufacturing tolerances.

Q: What are the key differences between the 186F20 and the 241-7-20?

A: The 186F20 provides higher power capacity (100VA versus 56VA) and output current (5A versus 2.8A). The 186F20 includes dual primary windings supporting both 115V and 230V inputs, while the 241-7-20 has a single 115V primary. The 186F20 has a lower isolation voltage rating (2000Vrms versus 2500Vrms) and larger physical dimensions. Both share the same 20V secondary output and center tap configuration.

Q: Is the 186F20 suitable for applications designed for the 241-7-20?

A: The 186F20 is compatible for applications where the 241-7-20 is specified, provided that the application can accommodate the larger physical footprint and does not require the higher isolation voltage of 2500Vrms. The increased power capacity of the 186F20 does not create compatibility issues in standard applications.

Q: Are all three transformers RoHS compliant?

A: Yes. The 241-7-20, 186F20, and F7-20 are all ROHS3 compliant and suitable for applications with RoHS requirements.

Q: What is the inventory status of these parts?

A: The 241-7-20 has 722 units in stock, the 186F20 has 741 units in stock, and the F7-20 has 1,072 units in stock. All three are active products.

Q: Do the termination styles differ between these transformers?

A: All three transformers support solder and quick connect termination. The F7-20 specifies quick connect as 0.187" (4.7mm), which is standard for this connector type. The 241-7-20 and 186F20 do not specify connector dimensions but are compatible with the same termination standard.